package test2;

import java.util.Scanner;

public class Main {

    static class TreeNode {
        public char val;

        public TreeNode left;
        public TreeNode right;

        public TreeNode(char val) {
            this.val = val;
        }
    }
    private static int i;
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String str = in.nextLine();
            i = 0;
            TreeNode root = createTree(str);
            inorder(root);
        }
    }
    private static TreeNode createTree(String str) {
        TreeNode root = null;
        if(str.charAt(i) != '#') {
            root = new TreeNode(str.charAt(i));
            i++;
            root.left = createTree(str);
            root.right = createTree(str);
        } else {
            i++;
        }
        return root;
    }
    private static void inorder(TreeNode root) {
        if(root == null) return;
        inorder(root.left);
        System.out.print(root.val + " ");
        inorder(root.right);
    }
}